Colon was optioned to Triple-A Omaha on Wednesday, Rustin Dodd of the Kansas City Star reports.
Colon had a decent stint with the Royals this spring, slashing .262/.311/.310 as a placeholder at second and third base. However, the Royals opted to give career minor leaguer Whit Merrifield a shot with the big league club Wednesday, which led to Colon being sent back down to Omaha.